//Function:show the usage of default argument.
#include <iostream>
using namespace std;
int boxVolume(int width, int length=1, int height=1);
int main()
{
	cout << "Volume 1= " << boxVolume(2) << endl;
	cout << "Volume 2= " << boxVolume(10) << endl;
	cout << "Volume 3= " << boxVolume(10,10) << endl;
	cout << "Volume 4= " << boxVolume(10,10,10) << endl;
	return 0;
}

int boxVolume(int width, int length, int height)
{
	int volume;
	volume = width * length * height;
	return volume;
}
